package com.sky.aspect;/**
 * @Package: com.sky.aspect
 * @ClassName: AutoFillAspect
 * @Author: CY
 * @CreateTime: 2025/7/22 10:17
 * @Description:
 */

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 *@author ChenYong
 *@time 2025/7/2210:17
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    /*
    * 切入点
    * */

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}

    /*
    * 前置通知，在通知中进行公共字段的赋值
    * */
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("开始进行公共数据填充");
        //获取到当前被拦截的方法上的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//获取方法签名
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);//获取方法的注解对象
        OperationType operationType = autoFill.value();//获取数据库操作类型
        //获取到当前被拦截的方法参数--实体对象
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        Object entity = args[0];
        //准备赋值的数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        //根据当前不同的数据库操作类型，为对应的表字段赋值
        if (operationType == OperationType.INSERT) {
            try {


            //为4个公共字段赋值
            //createTime
                Method setCreateTime = entity.getClass().
                        getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            //createUser
                Method setCreateUser = entity.getClass().
                        getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
            //updateTime
                Method setUpdateTime = entity.getClass().
                        getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            //updateUser
                Method setUpdateUser = entity.getClass().
                        getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射为对象赋值
                setCreateTime.invoke(entity, now);
                setCreateUser.invoke(entity, currentId);
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
            } catch (Exception e){
                log.error("创建或更新时设置公共字段值失败：{}", e.getMessage());
                throw new RuntimeException(e);
            }
        } else if (operationType == OperationType.UPDATE) {
            //为2个公共字段赋值
            //updateTime
            //updateUser
            try {

                //updateTime
                Method setUpdateTime = entity.getClass().
                        getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                //updateUser
                Method setUpdateUser = entity.getClass().
                        getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射为对象赋值
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
            } catch (Exception e){
                log.error("创建或更新时设置公共字段值失败：{}", e.getMessage());
                throw new RuntimeException(e);
            }
        }
    }
}
